162531 has 6 divisors (see below), whose sum is σ = 234780. Its totient is φ = 108348.

The previous prime is 162529. The next prime is 162553. The reversal of 162531 is 135261.

It is not a de Polignac number, because 162531 - 2¹ = 162529 is a prime.

It is a super-2 number, since 2×162531² = 52832651922, which contains 22 as substring.

162531 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 162531.

It is not an unprimeable number, because it can be changed into a prime (162731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9021 + ... + 9038.

It is an arithmetic number, because the mean of its divisors is an integer number (39130).

2¹⁶²⁵³¹ is an apocalyptic number.

162531 is a deficient number, since it is larger than the sum of its proper divisors (72249).

162531 is a wasteful number, since it uses less digits than its factorization.

162531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18065 (or 18062 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 162531 is about 403.1513363490. The cubic root of 162531 is about 54.5731140021.

Adding to 162531 its reverse (135261), we get a palindrome (297792).

The spelling of 162531 in words is "one hundred sixty-two thousand, five hundred thirty-one".